Umbraco allows possible Admin-level access to backoffice without Auth under rare conditions

{
  "id": "2d8684f01b117c07e97051008d16053af691acc3a9e16afef1dd7c9c0ada7945",
  "url": "https://osv.dev/vulnerability/CVE-2023-37267",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Umbraco allows possible Admin-level access to backoffice without Auth under rare conditions",
    "summary": "Umbraco is a ASP.NET CMS. Under rare conditions a restart of Umbraco can allow unauthorized users access to admin-level permissions. This vulnerability was patched in versions 10.6.1, 11.4.2 and 12.0.1.",
    "evidence": "osv:CVE-2023-37267",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-37267",
      "aliases": [
        "CVE-2023-37267",
        "GHSA-h8wc-r4jh-mg7m"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/umbraco/umbraco-cms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "e3f4b86f1c28e0ec30a1ad2a079e308af4cbfbf7"
                },
                {
                  "fixed": "82eae48d098b9deecbdf86cf288b2b18020e1fed"
                },
                {
                  "introduced": "d713b383c97ced18ecc53651952484735a011c29"
                },
                {
                  "fixed": "1f26f2c6f3428833892cde5c6d8441fb041e410e"
                },
                {
                  "introduced": "ba724ed97d77b9951a22fe693f9dd3bdd000047c"
                },
                {
                  "fixed": "20a4e475c8d7b91d263e4e103ef19f3644e7b569"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "10.0.0"
                      },
                      {
                        "fixed": "10.6.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "11.0.0"
                      },
                      {
                        "fixed": "11.4.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "12.0.0"
                      },
                      {
                        "fixed": "12.0.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "1f26f2c6f3428833892cde5c6d8441fb041e410e"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "20a4e475c8d7b91d263e4e103ef19f3644e7b569"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "82eae48d098b9deecbdf86cf288b2b18020e1fed"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "= 12.0.0",
            "release-12.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-37267.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.088418678Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/37xxx/CVE-2023-37267.json",
        "https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-h8wc-r4jh-mg7m",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-37267",
        "https://github.com/umbraco/Umbraco-CMS/commit/1f26f2c6f3428833892cde5c6d8441fb041e410e",
        "https://github.com/umbraco/Umbraco-CMS/commit/20a4e475c8d7b91d263e4e103ef19f3644e7b569",
        "https://github.com/umbraco/Umbraco-CMS/commit/82eae48d098b9deecbdf86cf288b2b18020e1fed"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-284"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/37xxx/CVE-2023-37267.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-37267",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517357,
  "published_at": "2023-07-13T13:43:59.383+00:00"
}